Was I Close to Projecting?? Advice Pls

Hi everyone, I've been trying to astral project for a few weeks now without much success. But I think I might have almost projected, but I'm not sure seeing as how I've never been successful in doing so. I laid down on my bed, got completely relaxed. I laid completely still not moving a bit. I then used the mind awake body asleep technique until I didn't feel my body at all. I then began to imagine I was on a swing, swinging back & forth. I only had to do this for maybe a minute or two until I began to feel as if I was falling. I continued to swing and suddenly my heart began beating very rapidly. So to the point I thought I was going to have a heart attack. I got nervous & opened my eyes. I feel like maybe opening my eyes stopped the process. I no longer felt the falling sensation & slowly my heart rate slowed down. Was I close to projecting? And if I get to the rapid heart beat how can I relax enough to push through that to get to the next phase. Any advice would be helpful & greatly appreciated. Thank you everyone ; )